Let's roll up our sleeves and solve this. We have 85 and we're going to multiply it by 358, essentially adding 85 to itself 358 times.
Step 1: 0 + 85 = 85
Step 2: 85 + 85 = 170
Step 3: 170 + 85 = 255
Step 4: 255 + 85 = 340
Step 5: 340 + 85 = 425
Step 6: 425 + 85 = 510
Step 7: 510 + 85 = 595
Step 8: 595 + 85 = 680
Step 9: 680 + 85 = 765
Step 10: 765 + 85 = 850
Step 11: 850 + 85 = 935
Step 12: 935 + 85 = 1020
Step 13: 1020 + 85 = 1105
Step 14: 1105 + 85 = 1190
Step 15: 1190 + 85 = 1275
Step 16: 1275 + 85 = 1360
Step 17: 1360 + 85 = 1445
Step 18: 1445 + 85 = 1530
Step 19: 1530 + 85 = 1615
Step 20: 1615 + 85 = 1700
Step 21: 1700 + 85 = 1785
Step 22: 1785 + 85 = 1870
Step 23: 1870 + 85 = 1955
Step 24: 1955 + 85 = 2040
Step 25: 2040 + 85 = 2125
Step 26: 2125 + 85 = 2210
Step 27: 2210 + 85 = 2295
Step 28: 2295 + 85 = 2380
Step 29: 2380 + 85 = 2465
Step 30: 2465 + 85 = 2550
Step 31: 2550 + 85 = 2635
Step 32: 2635 + 85 = 2720
Step 33: 2720 + 85 = 2805
Step 34: 2805 + 85 = 2890
Step 35: 2890 + 85 = 2975
Step 36: 2975 + 85 = 3060
Step 37: 3060 + 85 = 3145
Step 38: 3145 + 85 = 3230
Step 39: 3230 + 85 = 3315
Step 40: 3315 + 85 = 3400
Step 41: 3400 + 85 = 3485
Step 42: 3485 + 85 = 3570
Step 43: 3570 + 85 = 3655
Step 44: 3655 + 85 = 3740
Step 45: 3740 + 85 = 3825
Step 46: 3825 + 85 = 3910
Step 47: 3910 + 85 = 3995
Step 48: 3995 + 85 = 4080
Step 49: 4080 + 85 = 4165
Step 50: 4165 + 85 = 4250
Step 51: 4250 + 85 = 4335
Step 52: 4335 + 85 = 4420
Step 53: 4420 + 85 = 4505
Step 54: 4505 + 85 = 4590
Step 55: 4590 + 85 = 4675
Step 56: 4675 + 85 = 4760
Step 57: 4760 + 85 = 4845
Step 58: 4845 + 85 = 4930
Step 59: 4930 + 85 = 5015
Step 60: 5015 + 85 = 5100
Step 61: 5100 + 85 = 5185
Step 62: 5185 + 85 = 5270
Step 63: 5270 + 85 = 5355
Step 64: 5355 + 85 = 5440
Step 65: 5440 + 85 = 5525
Step 66: 5525 + 85 = 5610
Step 67: 5610 + 85 = 5695
Step 68: 5695 + 85 = 5780
Step 69: 5780 + 85 = 5865
Step 70: 5865 + 85 = 5950
Step 71: 5950 + 85 = 6035
Step 72: 6035 + 85 = 6120
Step 73: 6120 + 85 = 6205
Step 74: 6205 + 85 = 6290
Step 75: 6290 + 85 = 6375
Step 76: 6375 + 85 = 6460
Step 77: 6460 + 85 = 6545
Step 78: 6545 + 85 = 6630
Step 79: 6630 + 85 = 6715
Step 80: 6715 + 85 = 6800
Step 81: 6800 + 85 = 6885
Step 82: 6885 + 85 = 6970
Step 83: 6970 + 85 = 7055
Step 84: 7055 + 85 = 7140
Step 85: 7140 + 85 = 7225
Step 86: 7225 + 85 = 7310
Step 87: 7310 + 85 = 7395
Step 88: 7395 + 85 = 7480
Step 89: 7480 + 85 = 7565
Step 90: 7565 + 85 = 7650
Step 91: 7650 + 85 = 7735
Step 92: 7735 + 85 = 7820
Step 93: 7820 + 85 = 7905
Step 94: 7905 + 85 = 7990
Step 95: 7990 + 85 = 8075
Step 96: 8075 + 85 = 8160
Step 97: 8160 + 85 = 8245
Step 98: 8245 + 85 = 8330
Step 99: 8330 + 85 = 8415
Step 100: 8415 + 85 = 8500
Step 101: 8500 + 85 = 8585
Step 102: 8585 + 85 = 8670
Step 103: 8670 + 85 = 8755
Step 104: 8755 + 85 = 8840
Step 105: 8840 + 85 = 8925
Step 106: 8925 + 85 = 9010
Step 107: 9010 + 85 = 9095
Step 108: 9095 + 85 = 9180
Step 109: 9180 + 85 = 9265
Step 110: 9265 + 85 = 9350
Step 111: 9350 + 85 = 9435
Step 112: 9435 + 85 = 9520
Step 113: 9520 + 85 = 9605
Step 114: 9605 + 85 = 9690
Step 115: 9690 + 85 = 9775
Step 116: 9775 + 85 = 9860
Step 117: 9860 + 85 = 9945
Step 118: 9945 + 85 = 10030
Step 119: 10030 + 85 = 10115
Step 120: 10115 + 85 = 10200
Step 121: 10200 + 85 = 10285
Step 122: 10285 + 85 = 10370
Step 123: 10370 + 85 = 10455
Step 124: 10455 + 85 = 10540
Step 125: 10540 + 85 = 10625
Step 126: 10625 + 85 = 10710
Step 127: 10710 + 85 = 10795
Step 128: 10795 + 85 = 10880
Step 129: 10880 + 85 = 10965
Step 130: 10965 + 85 = 11050
Step 131: 11050 + 85 = 11135
Step 132: 11135 + 85 = 11220
Step 133: 11220 + 85 = 11305
Step 134: 11305 + 85 = 11390
Step 135: 11390 + 85 = 11475
Step 136: 11475 + 85 = 11560
Step 137: 11560 + 85 = 11645
Step 138: 11645 + 85 = 11730
Step 139: 11730 + 85 = 11815
Step 140: 11815 + 85 = 11900
Step 141: 11900 + 85 = 11985
Step 142: 11985 + 85 = 12070
Step 143: 12070 + 85 = 12155
Step 144: 12155 + 85 = 12240
Step 145: 12240 + 85 = 12325
Step 146: 12325 + 85 = 12410
Step 147: 12410 + 85 = 12495
Step 148: 12495 + 85 = 12580
Step 149: 12580 + 85 = 12665
Step 150: 12665 + 85 = 12750
Step 151: 12750 + 85 = 12835
Step 152: 12835 + 85 = 12920
Step 153: 12920 + 85 = 13005
Step 154: 13005 + 85 = 13090
Step 155: 13090 + 85 = 13175
Step 156: 13175 + 85 = 13260
Step 157: 13260 + 85 = 13345
Step 158: 13345 + 85 = 13430
Step 159: 13430 + 85 = 13515
Step 160: 13515 + 85 = 13600
Step 161: 13600 + 85 = 13685
Step 162: 13685 + 85 = 13770
Step 163: 13770 + 85 = 13855
Step 164: 13855 + 85 = 13940
Step 165: 13940 + 85 = 14025
Step 166: 14025 + 85 = 14110
Step 167: 14110 + 85 = 14195
Step 168: 14195 + 85 = 14280
Step 169: 14280 + 85 = 14365
Step 170: 14365 + 85 = 14450
Step 171: 14450 + 85 = 14535
Step 172: 14535 + 85 = 14620
Step 173: 14620 + 85 = 14705
Step 174: 14705 + 85 = 14790
Step 175: 14790 + 85 = 14875
Step 176: 14875 + 85 = 14960
Step 177: 14960 + 85 = 15045
Step 178: 15045 + 85 = 15130
Step 179: 15130 + 85 = 15215
Step 180: 15215 + 85 = 15300
Step 181: 15300 + 85 = 15385
Step 182: 15385 + 85 = 15470
Step 183: 15470 + 85 = 15555
Step 184: 15555 + 85 = 15640
Step 185: 15640 + 85 = 15725
Step 186: 15725 + 85 = 15810
Step 187: 15810 + 85 = 15895
Step 188: 15895 + 85 = 15980
Step 189: 15980 + 85 = 16065
Step 190: 16065 + 85 = 16150
Step 191: 16150 + 85 = 16235
Step 192: 16235 + 85 = 16320
Step 193: 16320 + 85 = 16405
Step 194: 16405 + 85 = 16490
Step 195: 16490 + 85 = 16575
Step 196: 16575 + 85 = 16660
Step 197: 16660 + 85 = 16745
Step 198: 16745 + 85 = 16830
Step 199: 16830 + 85 = 16915
Step 200: 16915 + 85 = 17000
Step 201: 17000 + 85 = 17085
Step 202: 17085 + 85 = 17170
Step 203: 17170 + 85 = 17255
Step 204: 17255 + 85 = 17340
Step 205: 17340 + 85 = 17425
Step 206: 17425 + 85 = 17510
Step 207: 17510 + 85 = 17595
Step 208: 17595 + 85 = 17680
Step 209: 17680 + 85 = 17765
Step 210: 17765 + 85 = 17850
Step 211: 17850 + 85 = 17935
Step 212: 17935 + 85 = 18020
Step 213: 18020 + 85 = 18105
Step 214: 18105 + 85 = 18190
Step 215: 18190 + 85 = 18275
Step 216: 18275 + 85 = 18360
Step 217: 18360 + 85 = 18445
Step 218: 18445 + 85 = 18530
Step 219: 18530 + 85 = 18615
Step 220: 18615 + 85 = 18700
Step 221: 18700 + 85 = 18785
Step 222: 18785 + 85 = 18870
Step 223: 18870 + 85 = 18955
Step 224: 18955 + 85 = 19040
Step 225: 19040 + 85 = 19125
Step 226: 19125 + 85 = 19210
Step 227: 19210 + 85 = 19295
Step 228: 19295 + 85 = 19380
Step 229: 19380 + 85 = 19465
Step 230: 19465 + 85 = 19550
Step 231: 19550 + 85 = 19635
Step 232: 19635 + 85 = 19720
Step 233: 19720 + 85 = 19805
Step 234: 19805 + 85 = 19890
Step 235: 19890 + 85 = 19975
Step 236: 19975 + 85 = 20060
Step 237: 20060 + 85 = 20145
Step 238: 20145 + 85 = 20230
Step 239: 20230 + 85 = 20315
Step 240: 20315 + 85 = 20400
Step 241: 20400 + 85 = 20485
Step 242: 20485 + 85 = 20570
Step 243: 20570 + 85 = 20655
Step 244: 20655 + 85 = 20740
Step 245: 20740 + 85 = 20825
Step 246: 20825 + 85 = 20910
Step 247: 20910 + 85 = 20995
Step 248: 20995 + 85 = 21080
Step 249: 21080 + 85 = 21165
Step 250: 21165 + 85 = 21250
Step 251: 21250 + 85 = 21335
Step 252: 21335 + 85 = 21420
Step 253: 21420 + 85 = 21505
Step 254: 21505 + 85 = 21590
Step 255: 21590 + 85 = 21675
Step 256: 21675 + 85 = 21760
Step 257: 21760 + 85 = 21845
Step 258: 21845 + 85 = 21930
Step 259: 21930 + 85 = 22015
Step 260: 22015 + 85 = 22100
Step 261: 22100 + 85 = 22185
Step 262: 22185 + 85 = 22270
Step 263: 22270 + 85 = 22355
Step 264: 22355 + 85 = 22440
Step 265: 22440 + 85 = 22525
Step 266: 22525 + 85 = 22610
Step 267: 22610 + 85 = 22695
Step 268: 22695 + 85 = 22780
Step 269: 22780 + 85 = 22865
Step 270: 22865 + 85 = 22950
Step 271: 22950 + 85 = 23035
Step 272: 23035 + 85 = 23120
Step 273: 23120 + 85 = 23205
Step 274: 23205 + 85 = 23290
Step 275: 23290 + 85 = 23375
Step 276: 23375 + 85 = 23460
Step 277: 23460 + 85 = 23545
Step 278: 23545 + 85 = 23630
Step 279: 23630 + 85 = 23715
Step 280: 23715 + 85 = 23800
Step 281: 23800 + 85 = 23885
Step 282: 23885 + 85 = 23970
Step 283: 23970 + 85 = 24055
Step 284: 24055 + 85 = 24140
Step 285: 24140 + 85 = 24225
Step 286: 24225 + 85 = 24310
Step 287: 24310 + 85 = 24395
Step 288: 24395 + 85 = 24480
Step 289: 24480 + 85 = 24565
Step 290: 24565 + 85 = 24650
Step 291: 24650 + 85 = 24735
Step 292: 24735 + 85 = 24820
Step 293: 24820 + 85 = 24905
Step 294: 24905 + 85 = 24990
Step 295: 24990 + 85 = 25075
Step 296: 25075 + 85 = 25160
Step 297: 25160 + 85 = 25245
Step 298: 25245 + 85 = 25330
Step 299: 25330 + 85 = 25415
Step 300: 25415 + 85 = 25500
Step 301: 25500 + 85 = 25585
Step 302: 25585 + 85 = 25670
Step 303: 25670 + 85 = 25755
Step 304: 25755 + 85 = 25840
Step 305: 25840 + 85 = 25925
Step 306: 25925 + 85 = 26010
Step 307: 26010 + 85 = 26095
Step 308: 26095 + 85 = 26180
Step 309: 26180 + 85 = 26265
Step 310: 26265 + 85 = 26350
Step 311: 26350 + 85 = 26435
Step 312: 26435 + 85 = 26520
Step 313: 26520 + 85 = 26605
Step 314: 26605 + 85 = 26690
Step 315: 26690 + 85 = 26775
Step 316: 26775 + 85 = 26860
Step 317: 26860 + 85 = 26945
Step 318: 26945 + 85 = 27030
Step 319: 27030 + 85 = 27115
Step 320: 27115 + 85 = 27200
Step 321: 27200 + 85 = 27285
Step 322: 27285 + 85 = 27370
Step 323: 27370 + 85 = 27455
Step 324: 27455 + 85 = 27540
Step 325: 27540 + 85 = 27625
Step 326: 27625 + 85 = 27710
Step 327: 27710 + 85 = 27795
Step 328: 27795 + 85 = 27880
Step 329: 27880 + 85 = 27965
Step 330: 27965 + 85 = 28050
Step 331: 28050 + 85 = 28135
Step 332: 28135 + 85 = 28220
Step 333: 28220 + 85 = 28305
Step 334: 28305 + 85 = 28390
Step 335: 28390 + 85 = 28475
Step 336: 28475 + 85 = 28560
Step 337: 28560 + 85 = 28645
Step 338: 28645 + 85 = 28730
Step 339: 28730 + 85 = 28815
Step 340: 28815 + 85 = 28900
Step 341: 28900 + 85 = 28985
Step 342: 28985 + 85 = 29070
Step 343: 29070 + 85 = 29155
Step 344: 29155 + 85 = 29240
Step 345: 29240 + 85 = 29325
Step 346: 29325 + 85 = 29410
Step 347: 29410 + 85 = 29495
Step 348: 29495 + 85 = 29580
Step 349: 29580 + 85 = 29665
Step 350: 29665 + 85 = 29750
Step 351: 29750 + 85 = 29835
Step 352: 29835 + 85 = 29920
Step 353: 29920 + 85 = 30005
Step 354: 30005 + 85 = 30090
Step 355: 30090 + 85 = 30175
Step 356: 30175 + 85 = 30260
Step 357: 30260 + 85 = 30345
Step 358: 30345 + 85 = 30430

So, 85*358 = 30430